Manufactured by CHG Bearing, the NP907899/NP385281P5 is a precision Four-Row Tapered Roller Bearings. Key dimensional parameters include a 510 mm bore diameter, a 655 mm outer diameter, and a 377 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
NP907899/NP385281P5 - Four-Row Tapered Roller Bearings
Technical Specifications
| Overview | |
|---|---|
| Part Number | NP907899/NP385281P5 |
| Brand | CHG® |
| Characteristics | |
| Bearing Type | Four Row Tapered Roller Bearing |
| Number of Rows | Four Row |
| Tolerance Class | P5 |
| Dimensions | |
| Bore Diameter (d) | 510 mm |
| Width (B) | 377 mm |
| Outer Diameter (D) | 655 mm |
| Bore Diameter Tolerance | -0.04 – 0 mm |
| Outside Diameter Tolerance | -0.045 – 0 mm |
| Inner Ring Chamfer | 4.8 min mm |
| Outer Ring Chamfer | 6.6 min mm |
| Inner Ring Assembly Width Tolerance | -0.25 – +0.25 mm |
| Outer Ring Assembly Width | 379 mm |
| Outer Ring Assembly Width Tolerance | -0.5 – +0.5 mm |
| Shaft Abutment Diameter | 526 mm |
| Housing Abutment Diameter | 628 mm |
| Lubrication Hole Diameter | 14 mm |
| Performance | |
| Basic Dynamic Load Rating C (kN) | 6010 kN |
| Basic Static Load Rating C0 (kN) | 19000 kN |
| Material | |
| Mass (kg) | 310 kg |
| Ring Material | Case-Hardened Steel / Bearing Steel |
| Rolling Element Material | Case-Hardened Steel / Bearing Steel |
| Cage Material | Grade 10 Steel |
| Lubrication Groove Width | 17.4 mm |
NP907899/NP385281P5 655 mm 510 mm 377 mm Frequently Asked Questions about NP907899/NP385281P5 Four-Row Tapered Roller Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
To safeguard CHG Bearing NP907899/NP385281P5 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (510 mm x 655 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
For international ocean and air freight, CHG Bearing packs NP907899/NP385281P5 with industrial VCI anti-corrosion barrier wrapping, sealed polybags, individual cartons, and fumigated ocean-worthy wooden crates. This multi-layer barrier guarantees rust-free storage for a minimum shelf life of 24 to 36 months.
Beyond standard alloy steel, CHG Bearing can customize the NP907899/NP385281P5 Four-Row Tapered Roller Bearings using AISI 440C stainless steel, black oxide coating, zinc-nickel plating, or hybrid ceramic (Si3N4) balls for applications involving chemical exposure, marine salt fog, or galvanic current hazards.
To ensure optimum performance of CHG Bearing NP907899/NP385281P5 Four-Row Tapered Roller Bearings under general rotational loads, our application engineers advise an inner-ring shaft tolerance of m5 or k5 for the 510 mm bore. For the 655 mm outer ring, an H7 or J7 housing bore fit is recommended to eliminate creep while accommodating normal thermal gradient expansion.
